Coil-winding machine



J. B. WHITMORE ET AL COIL WINDING MACHINE Filed 8 22. 1921 5 Sheets-Sheet l H |"llIlllllIIIIIIIINHIHllllll1 IWHIIWIMEIIW Lb INVENTOR Y s a, WH rrm 0 RE E. FERq u so N ATTORNEY Aug. 9

J. B. WHITMORE ET AL COIL WINDING MACHINE Filed Dec. 22. 1921 5 Sheets-Sheet 2 E. FERqusoN y ATTORNEY Aug. 12, 1924. 1,504,849

.1. B. WHITMORE ET AL COIL WINDING MACHINE Filed Dec. 22 1921 s Sheets-Sheet 5 INVENTORS JAMES fiWHWMoRa J o HN E. FERGUSON- I BY ATTORNEY Aug 12 T1924, 1,504,849

J. WHITMORE ET AL v COIL WINDING MACHINE AMES B.WH\TMOEE JOHN E. FERGUSON BY 2 ATTORNEY Aug. 123.1924.

J. B. WHITMORE ET AL COIL WINDING MACHINE File D 22 1921 5 Sheets-Sheet 5 FIG -lQ FIGJL INVENTORS ATTORNEY Patented Aug. 12,- 1924.

UNITED STATES I 1,504,849 PATENT OFFICE.

- JAMES BRYANT WHITMORF' AND JOHN EBLIN G- FERGUSON, OF BLOCMFIELD, NEW

JERSEY, ASSIGNORS '10 WESTINGHOUSE LAMP COMPANY, A CORPORATION. OF

FENNSYLVANIA.

COIL-WINDING MACHINE.

Application filed December 22, 1921. Serial Ko.524,061.

To all whom it may concern:

- Be it vknown that we, JAMES BRYANT WHITMORE, a citizen of the United States, and a resident of Bloomfield, in the county of Essex and State of New Jersey, and JOHN EBLING F'nRcUsoN, a citizen of the United States, and a resident of Bloomfield,

in the county of Essex and State of New Jersey, have invented a newand useful Improvement in Coil-Winding Machines, of which the followirfg is a specification.

This invention relates .to machines for winding a wire upon a mandrel to produce a helical coil and relates more particularly to machines for winding coils of filament wire for use in electric incandescent lamps especially adapted for projection purposes. An object of the invention is to provide a machine for expeditiously and efiiciently winding a filament wire upon a mandrel in a given direction and which may be automatically adjusted at the will of the operator to continue the winding in-a reverse direction.

A furtherobject is the provision of coordinating machine elements which may be quickly controlled to reverse the rotary movement of the mandrel.

A still further object is to provide means whereby the rotary movement of the mandrel may be automatically terminated to produce a, coil of a predetermined len The construction of a motion-picture gth.

lamp requires a coil filament of comparatively large-diameter wire. Such filaments were origlnal made by winding wire upon a mandrel to produce a helical coil'of a given length and. thenterminating the windlng operation to provide a straight course or portion of wire; the coiling operation was then resumed to again shape thewire into another coil having substantally the same pitch as the precedingvone. The foregoing operations resulted in a plurality of coils having straight portions therebetween.

It has been found in .practice, however, that coils wound unidirectionally tend to warp or buckle when made incandescent during use as a filament. This disadvantage has been greatly reduced by a reverse windin of adjacent coils, i. e., by wind-- in% ad acent coils in reverse directions.

y providing a filament with the aforesaid reverse winding,

the detrimental, strains and tensions are obviated because ing is detrimental to efiicient production.

Furthermore, it is diflicult to accurately maintain the pitch and the necessary tension.

In the present invention, mechanism is contemplated'for readily shaping a filament wire into a coil of a given length having its winding in one direction; said mechanism being capable of rapid and convenient adjustment for reversing the direction of winding. A series of coils is thereby pro duced each ooil being Wound in an opposite I direction-to the adjacent coil.

' The invention will be more fully understood by reference to the drawings, in which, j

Fig. 1 is a side elevational view of our machine;

Fig. 2 is an enlarged detail of a modification of an adjustable stop,

Fig.- 3 is a transverse cross-section of Fig. 2- taken on .line III-J11;

Fig. 4 is a diagrammatic end view of Fig. 1 showing the arrangement of gearwheels;

Fig. 5 is a side elevation, partly in section, of a portion of the machine;

'Flg. 6 is a plan view of. Fig. '5, partly in section- Fig. 7 1s a detail ofthe lever-actuating mechanism partly in. section;

Fig. 8 is a view, in elevation, of a pertion of the machine viewed from the side opposite to that shown in Fig. 5-;

ig. 9 is a fragmentary view, partly 1n section, of the mechanism shown in Fig. 8;

Fig. 10 is a plan of the mechanism emveniently divides itself into three major parts, namely, a mechanism for rotating 3 mandrel, which includes a wire-feeding device juxtaposed with respect thereto to permil: the wire to be wound about the mandrel; a mandrel-reversing mechanism which serves to permit a reversal of the direction of rotation of the mandrel to wind the wire thereon in a reverse direction; and a stop mechanism which controls the length of the coil wound upon the mandrel.

The mechanism for rotating the mandrel may comprise a lathe of the ordinary machine-shop type which, being well known, a description thereof is considered unnecessary. It may be stated, however, that the lathe or device for rotating the mandrel also employs mechanism for feeding the wire as it is being wound. Such mechanism comprises a suitable carriage or movable support which is provided to carry a spool 0 wire along the length of the mandrel, at which time the wire is fed, in any suitable manner, about the mandrel as it is rotated, to produce a plurality of coils. Stop mechanism, comprising certain co-ordinatiug machine elements, may be emplayed to stop' the rotary movement of the mandrel after a-predetermined length of coil 'li'as been wound and the carriage has necessarily moved a given distance.

Mechanism for reversing the rotary movement of the mandrel may comprise a mandrel-reversing member includin a bracket or frame in which is gonrna ed a rotatable casing containing a pair of adjustable keys. Mounted rotatably upon this casing are two gear-wheels suitably connected by interposed gearing with other gearwheels on a main driving sleeve. The arrangement or the interposed gear is such as to efi'ect a relative opposite rotation of Elie gears upon the mandrel-reversing menitated in the direction of rotation of either of the nears mounted thereon by engaging one of the adjustabie keys with one of the gear-wheels mounted on the casing. The mandrel-reversing member being reversible by the engagement of one of the said keys,

an oscillatory arm is provided and so associated with the reversing member that a movement-ofsaid arm may efiect an actuation of the keys and a reversal of the direction of movement of the mandrel-reversing drel, the carriage may be manually moved a given distance while the mandrel remains stationary for the purpose ofprovidin a substantially straight portion of wire tween,- adjacent coils. 'An actuation of the oscillatory arm hereinbefore described will Therefore, this member may be rothen produce an actuation of the elements comprising the mandrel-reversing member, thereby producing a reversal in the direction of rotation of the mandrel, with the result that another coil will be wound in the opposite direction. The foregoing operations are then re ted until a series of coils of thedesire length have been produced.

Referring now to the drawings and more particularly to Fig. 1, it will be readily seen that an embodiment of the present invention essentially includes a supporting table 7 provided with suitable iide rails 8 adapt-- ed to support a movabib carriage 9 upon which a drum or spool 11 of wire 12 is rotatably mounted. A movement of the carria is produced by means of a screw 14 which passes through nuts 15 secured to the carriage. The screw 14 is provided with a gear-wheel which, in turn, is rotated by a The particular mechanism for performing this mani ulation of the nuts has not been illustrate inasmuch that such hand adjustment of a carriage is well known.

For the purpose of winding the wire. it is necessary to porvide a core or mandrel and, in the present embodiment of the invention, this mandrel consists of a flexible rod 17 secured in proper relation to the spool 11 by means of chucks 18 and 19. The c uck 19 is rotatable in a bearing 21 and the chuck 18 is secured to a spindle 22 rotatable in a hollow shaft 23 (see Fig. 5) which, in turn, is rotatable in bearings 22 and 25.

It will be obvious that, when the spindle 22 is rotated, a conse uent rotation of the mandrel 17 results, an that, by alternately rotating the spindle in opposite directions, a wire may be wound upon the mandrel to produce a coil, each coil being wound in a irection opposite to that of the adjacent coil. Toaccomplish a reverse rotation of the spindle, the mandrel-reversing member is provided. This member includes a cylindrical casing 26 rot-atably supported in bearings '27 and 28; i

For the urpose of driving the casing, gears 31 and 32 am loosely on between the bearings 2 and 28. The Egars normally run free but are adapted to engaged, pH: at a time, with the casing to drive it. e gears are driven in oppoitioned' thereis obvious that by connecting the casing with either of said gears, it will be driven in a corresponding direction. For the purpose of driving the spindle 22, the outer or exposed end of the casin 26 has a gear wheel 34 secured to one end thereof which is connected, by a suitably positioned intermediate gear wheel 35 (see Fig. 6) to a gear wheel. 35 secured to one end of the spindle 22. I

Mechanism for connecting either the one or the other of-the gears 31 or 32 to the casing 26 comprises a pair of keys 36 and 37 disposed at the ends of shanks 38 and 39 which are positioned in a slotted cylindrical member 42 and bin ed upon a-pin 41 diposed transversely to t e said member and secured thereto.

The slotted member 42 is slidable longitudinally of the casing 26 and is normally maintained in a given outer position by the expansion of a spring 43 disposed between one end of the member 42 and a plu%44 secured in one endof the said casing. y reference to Fig. 5, it will be seen that one of the keys may always-be maintained in engagement with one of the gears by positioning the face of a key in a slot 45 or a slot 46 disposed in the internal or bearing surface of the gears 31 and 32, respectively. A flat spring 47 is positioned between the two keys to normallyforce them apart.

A movement of the rod 42 within the cas' ing serves to position one key in engagement with a gear wheel and remove the opposite key from engagement with the groove of the adjacent gear wheel. For instance, if the slotted member 42, as shown in Fig. "5, is pushed to compress the spring-43, a tapered face 48 of the ke 37 will engage the beveled edge of a suitab y disposedaperture in the casing, and the continued movement of therod 42 inwardly will cause the removal of the key from the gear wheel 31. This move ment also causes a beveled surface 49 of the key 361:0. travel overa beveled surface atthe edge of anaperture suitably disposed in the casing and in proper relation to the. slot 46 to permit the entrance of the key 36 into the the agency of the spring 47 which normally acts to thrust the keys against the side of the casing; therefore, the backward and A forward movement. of the slotted member 42 which carries the keys, serves toalternately engage a keywith either of the gear wheels 31 and 32. The mechanism which causes this-movement of the member 42 will be hereinafter described. From the foregoing, it will be understood that motion-is translated to the spindle 22 from the casing 26 through the trainof gears 34,35 and 35, while the casing 26 receives its motion from its mociation with the'sleeve 33 upon which are, suitably fastened a pair of gear wheels 50 and 51. 'The gear wheel 50 transmits motion to the gear wheel 31 by the interposition of an idler 52,

as indicated in Fig. 4, and the gear wheel 32 receives its movement through the agen of two'interposed idlers 53 and 54. In the diagrammatic representation of the gear wheels, illustrated in Fig. 4, the reference numeral 3l indicates the gear wheel in the rear of the gear wheel 32, and the numeral the driving sleeve 33 and also sets forth the mechanism for changing the direction of rotation of the casing by an adjustment of a mandrel-reversing member which permits the casing to'be engaged by either ofthe gear wheels 31 and 3 The sleeve 33 and the shaft 23 constitute an intermediate connection to a main drive through which the movement of all the rotary elements is derived. v

The main drive comprisesa pulley 55' con nected to. any suitable source of power, as, for instance, to the pulley cf a motor (not shown). The pulley 55 is positioned loosely upon the sleeve 33 and is adapted to be continually rotated.

It is preferable to provide a suitable mecha'nic'al expedient for intermittently rotating the shaft 23. This may be accomplished by the provision of asupple'mental pulley 56 keyed to the sleeve 33 and adapted to be e ed by the driving pulley 55 throu h ai g iuitable clutch, mechanism, the wellknown type of split-cone-clutch md cated 1n the drawing being preferable. This clutch is actuated by a sliding collar 57 keyed to the hollow shaft'23 and capable of long tudinal movement for the purpose of causing an engagement betweenthe pulley 55 and the supplemental pulley 56. Thus, when such engagement is made,'the pulley 55 driyes the pulley 56 and the hollow shaft23, being secured to .the pulley 56, is rotated therewith.

In. the present invention the movement of the sliding collar 57-is effected through the reciprocatory action of a hand lover or oscillatory member 58 pivoted upon a transverse rod 59 which is supported in a bearing 61. The rod 59 has fastened thereto a fork that, when the sliding collar 57 moves toward the pulley 56 and actuates the clutch, a rotary movement will be imparted to the pulley 56. It is, however, also desirable, for the pur se of reventing excess movement, to 8111111 taneou y stop or brakethe pulley 56 with each outward movement of the sliding collar 5?, namely, with each disenga ement of the pulley from the pulley 56. For this purpose, mechanism is provided, as clearly, shown in Figs. 8 and 9,.which .con1 prises a brake hand 64, one end of which is secured to a pin fastened to the framework of the machine, as shown in Fig. 5. The band then extends over the pulley 56', and the opposite end thereof is rovided with a pro ection 66 to which a spring 67 is secured (see Fig. 9), the opposite end of the spring being fastened to any suitable rigid portion of the machine. The brake band may thus be normall held in sufficient tensional engagement wit the pulley 56 to prevent its rotation. For the purpose of re easing the band from the ulley, a roller68 is fastened to the brake hand and itioned in the path of a multitoothed w cal 69 that is rotatable upon a pivot 73. secured in a bracket 72 which is fastened to the body of the machine. The teeth of the wheel 69 are provided with I concave few and the wheelis so disposed that, when the concave surface of a tooth s enga d by the roller 68, the brake band 1s l1fte in opposition to the spring 67 and the pulley 56 is released. As stated, it is necessary to" stop the pulley 56 by releasing the brake band simultaneousl with the rec1procatory movement of the siding collar 57. is accomplished by means of a depending 73 secured to an end of the rod 59 opposite to that to which the lever 58 is; secured and adapted to move with each movement of the lever '58. At the lower end of. the arm 73, a pawl 74 is movably positioned on a pin 75 and adapted to engage a ratchet wheel 76. The ratchet wheel'is secured to, and is movable with, the

toothed wheel 69; therefore, when, the pawl 74 eng s a tooth of the ratchet wheel and moves t e wheel, through the action of the lever 58 and rod 59, the toothed wheel 69, is rotated a given number of degrees either to position t e roller 68- upon a tooth,causing a release of the pulley 56, or to remove it therefrom and permit the spring 67 to recover and brake and stop the rotation of the pulley 56. The pawl 74 is normally maintained in engagement with the ratchet wheel 76 through the action of a spring 77, an end or which is secured toa lug 78 integral with the pawl, the opposite end of the spring being fastened to the body of the machine.

The lever 58 also controls mechanism for operating the mandrel-reversin member referred to above, by means of \i hich the direction of rotation of the spindle 22 may be changed through a movement of the slotted rod 42 in the casing 26, as is more clearly illustrated in Figs. 5 and 6 which. show the lower end 81 of the lever slidably secured, by a pin 82 to an arm 83.

The pin 82 passes through a slot 84 in the arm which permits additional motion of the lever 58, and a set screw 85 is positioned at one end of the slot for adjusting such motion. The arm 83 is ivoted to a lever plate 86 movable about a olt 87 upon which a toothed member 88 and a ratchet wheel 89ers mounted rotatably and fastened to each other in a, given relation. Adjacent the toothed member 88 is positioned a lever 90 pivoted on a pin 91 and so disposed that the lower arm 92 of the lever is adapted to make contact with the face of the teeth of said member.

The opposite arm 93 of the lever 90 is provided with a set screw 94, an end of which normally makes contact with the exposed end of the slotted member 42. A movement of the end 93 of the lever 90 toward the member 42 will, therefore, effect a movement of this member in opposition tothe spring 43 and bring the key 36 into engagement with the groove 46 of the gear whee 32.

A movement oi the lever 98 is caused by an oscillation of the end 8i of the lever 58 which actuates the arm 83 to cause a movement of the lever plate 86. This lever plate is provided with a pawl normally heldin contact with the ratchet wheel 89 by a spring 96. Thus, a movement of the lever end 81 will actuate the toothed member 88 and cause the end 92 to be positioned either between the teeth, in which case the casing 26 will rotate in the direction of the gear wheel 31, as shownin Fig. 5 'or' the end 92 may be raised to the summit of a tooth with the'result thata change of direction of rotation of the 26 will be 'efi'ected with a consequentchange in the direction of rotation of the spindle 22.

Although this machine may be operated to wind wire upon a mandrel in alternately difl'erent given directions by means of the above described machine elements and the machine may be manually stopped after the winding of each coil or series of coils, it has been found desirable to automatically stop the machine after a coil of predetermined length has been wound.

Any suitable stop mechanism may be employed to perform the above mentioned op eration. The stop mechanism illustrated in the drawing, however, embodies some features peculiar to the present'invention and comprises certain operative parts which ac tuate the sliding collar 57 and the brake band 64.

The stop mechanismcomprises a. rod 97 (see Fig. 1)-slidably ositioned in guides 98 and having one en thereof projectin upwardly to providea tr pping finger 9% for actuating mechanism to be later described. The sliding rod 97 is provided with a series of holes 101 spaced at predetermined intervals and adapted to receive pins or pegs which may thus be positioned in the path of the carriage 9 so that, as the carriage moves during the winding of a wire upon a mandrel, it will, when a coil of a given length has been wound, make contact with such suitably positioned pin and move the sliding rod 97 to cause the finger 99 to actuate mechanism which will automatically stop the rotation of the mandrel- It will be evident that, by stopping the rotation of the mandrel as above described, a. coil having-a given number of complete turns, or fraction thereof, will be produced.

The device upon which the finger 99 acts may comprise any suitable mechanical movement and, in the drawing, is illustrated as consisting of a cylindrical housing 102 (see Figs. 6 and 7) positioned in sultable relation to the pulley 56 and secured to, and movable with, the lever 58. Within the housing 102 is disposed a slid- I ing rod 103 having a pin or trigger 104,

which will be herein termed a trip-member, secured thereto and extended through a slot 105 disposed upon the under side of the housing. Between one end 107 of the rod 103 and a cap 108, secured to the end of the housing 102 is ositioned a helical spring a 109. One end 0 the spring is secured-to the housing andthe opposite endis adapted to be disposed in a transverse notch at the end 107 of the rod. Thus, in assembling, when the sprin .is .in pOsitionwith one end secured to t e housing, the rod 103 is pushed into the housing until the end 111 of the spring ispositioned in the notch at the end of the rod which isrotated until a torsional force is produced in the spring. The in 104 is then inserted through the slot 105 and secured in the. rod. It will therefore, be evident that the tendency'of' the pin is 'to press upon one side-of the slot through the torsional action of the spring and the rod is forced outwardly through the expansive action of'the spring.

For the purpose of maintaining the rod normally in its inner position, a right-angle extension 112 is provlded at the end of the slot disposed ad acent the lever 58; thus, when the rod is forced inwardly until the pin registers with the extension 112, the pin will automatically be urged into the extension which will prevent the outward movement of the rod.

Since the rod 103 is secured to the lever 58, it will be evident that a lateral movement of the rod 103 will cause a similar movement of the lever. For the purpose of effecting a lateral movement, the pulley 56 is provlded with cam faces 113, and the rod 103 is so disposed that, when in its outer position, its exposed end lies normally in the path of the said raised faces and a movement of the pulley serves to make contact between the rod and one of the raised faces 113 to forcethe rod sideways and thereby actuate the lever 58, with the result that the sliding collar is actuated and the brake is applied to the pulley 56 and the operation of the machine 1s automaticall terminated.

It is obvious that the num er of raised faces 113 may be varied and that the action of the various parts will be governed accordingly. -This movement of the rod 103 may be effected after any iven number of turns of wire have been ma e upon the mandrel. As above. described, the carriage 9, after a given movement, will make contact with a pm disposed in one of the holes 101, thereby moving the sliding rod 97 and the finger 99 which is so disposed as to engage and release the trigger 104 from the extended portion 112 of the slot in the housing 102. The rod 103 is then pro'ected in the path of the cam faces 113, an mechanism is thus actuated tostop the machine until other mechanism is' o erated to reverse the rotation of the man rel. A spring 114 (see Fig. 1 serves to normally return and maintaln t e sliding rod 97 against a stop 115, and the pin or peg is then manually advanced to another of the holes 101- and a re etition of the stop ing operation occurs a r another coil has een wound.

The wire to be coiled upon the mandrel or arbormay be guided or fed thereto in any suitable manner. One form of guide mechanism is illustrated in Figs. 10 and 11 in which the wire 12 is led from a spool 11 and guided around a post 117 and between a friction grip comprising a stationary surface 118 on a block 119 and the face of a spring member 121. secured to a rigid upr1ght122. The wire is secured to the mandrel by the insertion of an end thereof into a notch-or aperture in the chuck 18. The

mandrel 17 is disposed in, and guided by, a

passage or slot in the block 119 and is thus steadled during the winding operation. A clam 123 having movable jaws 124 is shown in Fig. 10, this clamp being applied to the mandrel after eachcoil has been wound, and the jaws 124 serve as a stop to prevent the unwinding of a coil when a succeeding coil is being wound in the opposite direction. The clamp may be in the orm of a chuck having aws ada ted for quick adjustment about the man rel at the strai ht portions curate adjustment for the win in 125 of the wire between the coi sv 126. The wire, if desired, may be electrically or otherwise heated during the winding operation.

For the purpose of afiordin a more acof coils than can be obtained from the disposition of pegs in the holes 101, a sliding member obtainable, inasmuch as the indexing fin r maybemoved more readily and the nnm r.

of] linear sub-divisions may be increased,

thus insuring greater accuracy for controlthe movement of the earn fter a series of coilshave wound they are removed from-the mandrel and divided into groups and shaped for service as lamp filaments. A group of attached coils may be bent-to any desired shape as, for instance, to saw-toothed form, by bending at the straight portions 125.

when operating the coil-winding machine, a pin is inserted in one of the holes 101 and at a distance from the carriage de-j sending upon the number of turns or loo 5 esired in a coil. Wire is then led from t e spool 12 tothe mandrelin an suitableman- I agency of the drive, the lever 58 may I the sliding collar 57 toward, the wh ch operation causes a rotation c1 i-Qthei transmittedto the spindle 22 throu h the transmitted to the mandrelj17, and the w reh therarri I the trigger 'IMtoj'cEuse'fli s ip to 'moven the nathiof. the raised ner. As the pulley 55 rovi as a continual actuated to move sleeve 33 and, consequently, the gears and,

51 which latter, in turn cause rotation of gears31 and'32'in opp tedirectionai. One of the keys 36 and 3 however, is engaged by one of the gears 31 and 32 on' the casing:

26 which is thereby rotated, and-motion is' are 34, 35' and3 5. e 'relative motion. 0 the spindle 22 is accordingly sa n-1 e w -pi w. "s the holes101,-'thes'li i3 i '5 trips as? 103- 1113,-

ma be wound thereouinjt 'giyendirectiom I -sition. For this pur provided with a beve 97'is'thus moved" to trig) operations.

one of which almost instantly engages the rod 103. The action of the cam face 113 forces the rod and the lever 58 in the direction of the arrow X and causes a movement of the sliding collar 57 to disengage the pulley 56 from the driving pulley and an actuation of the brake to stop rotationof thepulle 56, and consequently, rotation of the man rel 22. The carriage 9 may then, if desired, be moved slightl to provide a straight portion of wire. e movement of the lever is'then continued in the direction of the arrow X Fig. 5) and the pin 82 on the end 81 of the ever 58 engages the end of the slot 84 of the arm 83 and causes an actuation of the ratchet wheel 89. The toothed member 88 is thereby moved a iven number of degrees and the end 92 o the lever 90 is thus made to traverse the inclined portion of a tooth until seated at the summ'it thereof, and the end 93 of the lever 90 forces the slotted rod 42 inwardly to reverse the engagementof one of the keys 36 and 37' with gear wheels 31 811(132, respectively.

Continued movement of, the lever 58 also serves to rock the arm 73 carrying the pawl 74 (see Fig. 8) and causes the awl to rotate the ratchet wheel 76 a su cient number of degrees to compel the roller 68 to move up the inclined face of one of the teeth until it takes the gosition shown thereby releasing the brake nd 64 from the pulley 56. Movement of t e lever 58 also serves to return the sliding rod 103 to its inner pc- I a projection 128 ed face 129, is secured to the bearing 24and so positioned that, when the lever 58 is moved, the end of the rod 103 will make contact with the beveled surf and the rod will be adually forced inwardly toits normal ition as the lever 58 is moved toward t e end of its stroke in the direction of the arrow X.

Movement of the lever, therefore, operates to change the direction of the travel of the casing 26 y changing its key connection to the gears 31 and 32and it hasalso operated to the brake.

A return movement of the lever- 58, in the direction of the arrow Y, to move the sliding collar 57 toward the pulley 56 and operates the clutch which then connects the two pulleys to cause the machine to operate and rotate the mandrel 17 in a direction that is dependent upon Iwhich of the gear wheels 81 and '82 is ene se b ,number of coils have wound, at which i oneof the keys36fand 37 the continues to rotate-until a given :the carriage engages the r p utioned in one of the holes 101.

he the tri 104 a plurality off on the and cause a recurrence 0 enwinding mandrel, the said coils being connected by straight portions in a predetermined position about the mandrel. -This is accomplished in accordance with the present invention by an adjustment of the pegs or pins in the holes 101 or by the movement of the sliding member 133 shown in Fig.

whereby the length of coil may be varied, and it will be obvious that this variation in the length of the coil provides for the termination thereof either upon a complete turn or a fraction of a turn aboutthe mandrel. Thus, the straight'portion of the wire may be located either on the one or the other side of the mandrel and, in certain types of coils, it is desirable to alternate the position of the straight portion of the wire to make each successive portion diametrical opposite to the other.

Although the present embodiment of the invention shows a comparatively flexible mandrel, it will be evident thatone of a more rigid character may be employed. Where desirable a mandrel having various configurations in transverse cross-section are apple .cable and may, for certain types of lamps,

be required. Furthermore, if desirable, the reversmg mechanism may be employed in association with a machine in which the movement of the mandrel is lon itudinal as well as rotary, in which case t e spool of wire would be mounted on a-stationary support. 3

While a single embodiment of this invention is herein described and illustrated in the annexed drawings, it. is to be understood that the invention is not limited thereto and candescent electric lamp filament, the com-,

many modifications will suggest themselves bination of means for-winding a filament wire in a given direction to produce a coil and means for automatically adjusting the machine to wind said wire in a reverse direction to produce a coil.

3. In a coil-winding machine, the combination with a mandrel, means for winding a series of coils of substantially equal diameter thereon and means for alternately mandrel to are alternate y reversely wound.

changing the direction of rotation of said roduce a series of coils which 4. In a coil-winding machine, the combination with a mandrel, means for '"winding a series of coils 'upon said mandrel, means for alternately changing the direction of rotation of said mandrel to produce a series of coils, each of said coils being reversely wound with respect to the adjacent coil, and means for varying the length of each coil.

5. In a coil-winding machine, the combination with a mandrel, means for rotating said mandrel, means for alternately changing the direction of rotation. of said mandrel after the same has rotated a predetermined number of times, and means for var ing the number of turns of said mandre whereby a plurality of series of. coils are produced, each coil being of reverse Winding to the adjacent coil.

6: In a coil-windin machine, the combination with a mandrei means for winding a wire on said mandrel, means for auto-- matically stopping the winding operation after a coil has been wound, means for continuing the winding in an opposite direction until another-coil has been wound and means for varying the number of loops constituting each coil. y

7. In a coil-winding machine, the combination with means for successively winding a series of coils, means for automatically stopping the winding operation after each coil, means for adjustin the machine to change the direction 0? winding in the succeeding coil, means for starting the machine and means for varying the length of said coils. j

8. In a coil-Winding machine, the combination with a mandrel, means for rotating said mandrel a predetermined number of turns and automatic means for alternately changing the direction of rotation of said mandrel to produce a plurality of consecutive coils of substantiallyequal diameter, each coil being of reverse winding to the adjacent coil.

9. In a coil-winding machine, the combination with means for successively winding a series of coils, means for automatically stopping the winding operation after each coil, means for adjustingthemachine to change the direction of winding in the succeeding coil and means for starting the machine.

10. In a coil-winding machine, the combination of a mandrel, means for securing a wire to said mandrel, means for rotating said mandrel'in a given direction to Wind a helix thereonand means for adjusting the machine to change the direction of rotation of said mandrel to produce a helix of reverse winding. i

11. In a coil-winding machine, the combination with a mandrel, means for winding a wire on said mandrel, means for automatically stoppingthe winding operation when a coil of a predetermined length has been wound andmeans for continuing the windin in an opposite direction until a coil of a difierent length has been wound.

12. In a coil-winding machine, the combination with means for successively winding a series of coils upon a mandrel, a traveling support for the wire to be wound, means associated with said support for engagin the mechanism' positioned in the path 0 travel of said support to cause a termination of the movement thereof when said support has moved a given distance.

13. In a coil-winding machine, the combination with a mandrel, means for rotating said mandrel in a given direction, a carriage adapted to transport a spool of wire lengthwise of said mandrel during the windmg of the wire thereon, means for automatically stopping the rotation of said mandrel after a given length of coil has been Wound and means for reversing the rotation of said m'andrel whereby. a coil of a predetermined length may be wound in an opposite direction.

14. In a coil-windin machine, the combination with a mandre means for rotating said mandrel in a given direction, a carria e adapted to carry a spool of wire longitu inally of said mandrel, meansfor winding a series of coils from said wire upon said mandrel, means associated with said carriage for automatically terminatin the movement of said mandrel after'a coi of a predetermined length has been wound thereon, said carriage being adapted to be moved to provide a straight portion of wire, means for reversing the direction of rotation of said mandrel to wind a coil in an o posite direction and means for varying t e length of said coil.-

15. In a coil-windin machine, the combination with a mandre means for rotating said mandrel in a given direction, a carriage,

said carriage longitudinally of said mac ine to convey a spool of wire to be wound upon said mandrel, stop mechanism, means associated withsaid carriage for said step mechanism to terminate the-rotation of the mandrel when a coil has been wound thereon and means forL' varying the number of loops 'in said CO1 16. In a coil-windin machine the combination with a mandre means for rotating said mandrel in a given direction,- a car- I said mandrel in a reverse .duce an oppositely wound coil.

riage adapted to transport a spool of wire as said wire is wound upon saidmandrel, means associated with said carriage for terminatin the rotation of the mandrel. when a coi has been wound thereon,jmeans for var ing the number-of turnsin said coil and means for causin a rotation of ectionto pro-i 17 In a coil-winding machine, the combination of a mandrel, means for rotating said mandrel successively in opposite directions, a support for a spool of wire, means for moving said support along the mandrel as the wire is wound thereon, and means for automatically stopping rotation of said mandrel and movement of said support when a coil of a predetermined length has been wound. p

- 18. In a coil-winding machine, the combination of a mandrel, means for rotating said mandrel successively in opposite directions, a traveling support capable of movement along said mandrel as the wire is wound thereon, said support being associated with said mandrel whereby a predetermined movement of said support causes a cessation of the rotation of said mandrel.

19. In a coil winding machine the combination of a mandrei, means for rotating said mandrel, a support for a spool of wire, means for guiding wire from said spool to said mandrel, means for securing said wire from relative movement with respect to said mandrel, means for automatically alternately rotating and sto ping the rotation ofsaid mandrel to prodhceaooil of wire having alternate opposite directions.

20. In a coil winding machine the combination of a rotatable mandrel, means for rotating said mandrel, a support for a spool of wire, means for ding said wire to said mandrel, means i preventing relative movement of said wire and said mandrel, an oscillatory member associated with said rotatin means whereby a movement of and man rel effects a termination of movement of said mandrel and means alternately rotating said mandrel in op ite directions to produce a.v coil of'wire aving portions thereof wound in difierent directions.

21.. In a coil winding machine, the combi: nation of a mandrel, means for rotating said mandrel, an oscillatory member adapted to control said rotating means, means for automatically actuating said member to stop the rotation 'of said mandrel, means for alternately rotating said mandrel in opposite directions to produce a coil having portions thereof reversely wound.

portions thereof wound in Ill 22. In a coil-winding machine, the combination with a mandrel and means for rotating said mandrel for the purpose of winding a wire thereon, of a traveling support for wire to be wound, a mandrel-reversing memiber ada a reversal of the direction of rotation of the mandrel and an oscillatory arm adapted when moved, to actuate said member an means for stopping the rotation of said mmdrel after a 0011 of a predetermined length has been wound thereon.

pted, when actuated; to cause 23 In a coil-winding machine, the oombicauses a termination of rotation of the mandrel and means for changing the direction of rotation of said mandrel to wind the wire in an opposite direction.

25. In a coil-winding machine, the combination of a mandrel, means for rotating said mandrel to wind a wire thereon, a'mandrel-reversing member for controlling the direction of rotation of said, mandrel, means for automatically stopping the rotation of said mandrel and an oscillatory arm associated with said member whereby a movement of said arm efl'ects a reverse rotation of said mandrel.

'26. In a coil-winding machine, thecombination with a mandrel and means for rotating said mandrel to wind a wire thereon, of a mandrel-reversing member for changing the direction of rotation of said mandrel, an oscillatory arm, means for causinga cessation of movement of said mandrel by a partial movement of said arm in a given direction and means whereby a continued movement of said arm causes an actuation of said member for reversing the direction of rotation of said mandrel.

27. Ina coil-Winding machine, the combination with a mandrel and means for rotating said mandrel to wind a wire thereon, of a mandrel reversing member, an oscillatory arm associated with said member, said memberacting .when moved in a given direction to effect a termination of the rotation of said mandrel and to cause an actuation of said member for reversing the rotation of said mandrel when the machine is. again in operation and means associated with said oscillatory member whereby a movement thereof in an opposite direction causes the operation of the machine.

28. In a coil-winding machine, the combination with a mandrel and means for'rotating said mandrel for the purpose of winding a wire thereon, of a traveling support for wire to be wound, a mandrel-reversing member adapted, when actuated, to cause a reversal of the direction of rotation of theman- V drel, an oscillatory arm adapted, when moved, in a iven direction'to effect a termination of t e rotation of said mandrel and to cause an actuation of said member for reversing the rotation of said mandrel when revolutions thereof.

34. In a coil-winding machine, the com-- again rotated and means associated with said oscillatory member whereby a movement thereof in LII'OHpOSIlZG direction causes a rotation of said mandrel.

29. In a coil-winding machine, the combination with a mandrel and means for rotating said mandrel to wind a wire thereon, of a mandrel-reversing member, means for automatically terminating the rotation of said mandrel after a coil of a predetermined length has been wound thereon and an oscillatory arm a-dapted,.when oscillated in one direction, to actuate said member for efi'ect ing a reverse rotation of said mandrel when again rotated.

30. In acoil-winding machine, the comsaid mandrel to wind a wire thereon, an oscillatory arm, a mandrel-reversing member.

and means for automatically stopping the rotation of said mandrel after a given number of revolutions, said oscillatory arm adapted, when actuated to operate said reversing member and to effect a rotation of said mandrel in an opposite direction.

31. In a coil-Winding machine, the com bination of a mandrel, means for rotating said mandrel to wind a wire thereon, means for automatically terminating the rotation of said mandrel after a coil of a predetermined length has been wound thereon, an osbination of a mandrel, means for rotating cillatory arm adapted when moved in one direction to adjust mechanism for causing a reverse rotation of said mandrel and means connected with said arm, whereby a movement thereof in an opposite direction will cause said reverse rotatlon of said mandrel.

32. In a coil-winding machine, the combination of a mandrel, means for rotating said mandrel to wind a wire thereon, a support adapted to move longitudinally of the mandrel and convey Wire to {be wound,

means for automatically terminating the rotation of said mandrel after a coil of a predetermined length has been wound thereon, an oscillatory arm adapted, when moved in one direction, to adjust mechanism for causing a reverse rotation of said mandrel and means connected with said arm whereby a movement thereof in an opposite direction gill cause said reverse rotation of said man- 33. In a coil-winding machine, the combination of a mandrel, means for rotating said mandrel in a given direction, a movable support for a spool of wire, a positive driving means for said support, means for winding said wire on said mandrel, means for changing the direction of rotation of said mandrel and means for automatically stopping said mandrel after a given number of bination of a mandrel, means for rotating said mandrel m a given direction, amandrel-reversing member, a movable support for a spool of wire, means for winding said, wire on said mandrel, means associated with said support whereby said support operates to stop the rotation of said mandrel and an oscillatory arm associated with said mandrel and reversing member, whereby a movement of said arm in one direction causes a termination of movement of said mandrel and an opposite movement causes an actuation of the reversing member. Y

35. In a coil-winding machine, the combination of a mandrel, means for rotating said mandrel in a given direction, a mandrelreversing member, a relatively movable support for a spool of wire, means for automatically stopping the rotation of said mandrel and an oscillatory arm associated with said reversing member and adapted to be actuated to change the direction of rotation of said mandrel.

36. In a coil-winding machine, the combination of a mandrel, means for rotating said mandrel in a given direction, an oscillatory arm disposed in operative relation to said mandrel, a traveling support for a spool of wire and means for winding said wire on said mandrel, said support being adapted to effect a cessation of rotation of said mandrel when a predetermined number of coils has been wound, said oscillatory arm being adapted, when moved'in one direction, to cause a termination of movement of said mandrel and an opposite movement to cause a reverse rotation of said mandrel.

37. In a coil-winding machine, the combination of a main driving pulley, a supplemental drivingpulley and a sleeve rotatable therewith, a shaft within said sleeve, two gear wheels disposed on said sleeve, a rotatable casing having two gear wheels rotatable thereon, gearing interposed between the first and last mentioned gear wheels and adapted to efi'ect the rotation of the two lastmentioned gear wheels in opposite directions, a gear'wheel secured to one end of said casing and disposed in engagement with a.

gear wheel secured to said shaft, a pair of adjustable keys positioned-within said casing and adapted to be engaged with the gear wheels thereon and an oscillatory arm dis-i posed in operative relation with said keys, whereby a movement of said arm causes an engagement of one key and a disengagement of the other with a gear wheel on said casing thus reversing the direction of rotation of said casing, and consequently said shaft.

38. In a coil-winding machine, the combination of a main drivm pulley, a supplemental driving pulley an a sleeve rotatable therewith, ashaft within said sleeve, two

being adapt gear wheels disposed upon said sleeve, a rotatable casing having two gear wheels rota- 1 casing and adapted to 'be engaged with the gear wheels thereon, an oscillatory arm disposed in operative relation with said members, whereby a movement of said arm causes an engagement of one member and a disengagement of theother with a gear wheel on said casing, thus reversing the direction of rotation of said casing, and consequently said shaft, a mandrel secured to and rotatable with said shaft and a traveling support for eonveyin -a spool of wire, said spool to be moved along said mandrel as the wire is wound thereon.

39. In a coil-winding machine, the com bination of a main driving pulle a supplemental driving pulley and nice anism for starting and stopping said pulley, a sleeve rotatable with said pulle a shaft within said sleeve, two gear whee s disposed on said sleeve, a rotatable casing having two gear wheels rotatable thereon, gearing interposed between the first and last mentioned gear wheels adapted to effect the rotationof the two last mentioned gear wheels in opposite of said casin and disposed in enga ment with a gear w eel secured to said sha t, a reversing-member comprising a pair of adjustable kegs positioned within said casing and cillatory am being associated with said stopping mechanism for terminating the rotation of the supplemental drivin pulley and with said starting mechanism w ereby a movement of said arm in one direction acts to stop the movement of said shaft,.and a movement-of said arm in another direction acts to permit the rotation of the shaft.

In'testimony whereof, we have hereunto iggicribed our names this 21st day of Dec,

JAMES BRYANT wnrmoaa. JOHN EBLING FERGUSON.

directions, a gear wheel secured to one end casing, and consequently said shaft, said os- I 

